Correlation Processor Based Sidelobe Suppression for Polyphase Codes in Radar Systems

Thakur, Ankur; Saini, Davinder S.

doi:10.1007/s11277-020-07576-9

Cited by 13 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reactive tissue and well-differentiated cholangiocarcinoma are difficult to distinguish. As a source for metastases, a primary adenocarcinoma should be omitted when intrahepatic cholangiocarcinoma is considered [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Angiogenesis and Pathological Classification of Extrahepatic Cholangiocarcinoma by Dynamic MR Imaging for E-Healthcare

Tan

Sun

Wang

et al. 2021

Journal of Healthcare Engineering

View full text Add to dashboard Cite

For staging cholangiocarcinoma and determining respectability, MR is an accurate noninvasive method which provides size of tumor and vascular patency information. Dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) is a noninvasive inspection method for evaluating the vascular structure and functional characteristics of tumor tissue. However, some limitations should be noted about the technology. At present, the technology cannot be used alone, which is just an assisted method during the conventional MRI examination. 50 ECC patients, admitted to Indira Gandhi Medical College and Hospital between 2016 and 2019, were selected as research subjects. They were classified pathologically according to the Steiner classification system. After image processing, regions of interest (ROIs) were selected from the image to measure the rate constant (Kep), extravascular space volume fraction (Ve), and tissue volume transfer constant (Ktrans). There were 15 cases with highly differentiated carcinoma, 23 cases with moderately differentiated carcinoma, and 12 cases with lowly differentiated carcinoma. Non-VEGF expression was noted in 21 cases, with low expression noted in 15 cases, moderate expression noted in 14 cases, and no high expression case noted. The relevant parameters in the dynamic MRI image can quantitatively reflect the angiogenesis and pathological classification of ECC, which is suggested in the clinical treatment of ECC. The Ktrans, Kep, and Ve values of the ECC patients were all not associated with the pathological classification, with no significant difference ( P < 0.05 ). Besides, due to the fact that the patient cannot completely hold his breath, the air leak reduces the image quality.

show abstract

Section: Introductionmentioning

confidence: 99%

Evaluation of Angiogenesis and Pathological Classification of Extrahepatic Cholangiocarcinoma by Dynamic MR Imaging for E-Healthcare

Tan

Sun

Wang

et al. 2021

Journal of Healthcare Engineering

View full text Add to dashboard Cite

show abstract

“…The performance of various polynomials is examined by varying the optimizing parameter γ and the polynomial which offers maximum PSL reduction is chosen while maintaining constant envelope constraint. Authors in [4] proposed sidelobe suppression method which is based on the correlation processor that uses the P4 polyphase codes, which are good at Doppler tolerant property. Proposed method is implemented with six different windows namely Hamming, Hanning, Blackman, Nuttall, Blackman-Nuttall, and Blackman-Harris.…”

Section: Literature Reviewmentioning

confidence: 99%

Digital Pulse Compression: Linear Frequency Modulation Approach

Gowda

Siddesh

Anu³

et al. 2023

Preprint

View full text Add to dashboard Cite

In radar system a challenging task is to achieve a good range resolution with a shorter pulse which needs more peak power. High peak power makes the design of transceivers complex because the devices used to build transceivers are able to withstand with high peak power. In literature pulse compression method is widely used to minimize the problem of using high peak power signal. In this paper, the problem of generating a high peak power signal with shorter duration, which is used to detect only moving targets has been addressed by proposing a novel radar pulse compression method using Linear Frequency Modulation with improved range resolution with a basic construction of a pulse processor which is analogous to a standard matched filter, and is reformed to suit an application. Multiple code types and lengths needed are used due to the flexibility in the design which reduce an uncertainties affected by the use of high pulse repetition frequencies.

show abstract

“…Examples of polyphase codes are as follows: frequency-derived codes, frank code, Lewis and Kretschmer code, etc. The polyphase frank code finds application in the omnidirectional RADAR systems (Singh and Subba Rao, 2006; Thakur and Saini, 2020). The major task in the polyphase code design is to derive the code with better coherence and correlation.…”

Section: Introductionmentioning

confidence: 99%

FHSA: fractional harmony search algorithm for polyphase code design in radar signal processing

Rao¹,

V.²

2022

IJPCC

View full text Add to dashboard Cite

Purpose The purpose of this research is to design and develop a technique for polyphase code design for the radar system. Design/methodology/approach The proposed fractional harmony search algorithm (FHSA) performs the polyphase code design. The FHSA binds the properties of the harmony search algorithm and the fractional theory. An optimal fitness function based on the coherence and the autocorrelation is derived through the proposed FHSA. The performance metrics such as power, autocorrelation and cross-correlation measure the efficiency of the algorithm. Findings The performance metrics such as power, autocorrelation and cross-correlation is used to measure the efficiency of the algorithm. The simulation results show that the proposed optimal phase code design with FHSA outperforms the existing models with 1.420859, 4.09E−07, 3.69E−18 and 0.000581 W for the fitness, autocorrelation, cross-correlation and power, respectively. Originality/value The proposed FHSA for the design and development of the polyphase code design is developed for the RADAR is done to reduce the effect of the Doppler shift.

show abstract

Correlation Processor Based Sidelobe Suppression for Polyphase Codes in Radar Systems

Cited by 13 publications

References 20 publications

Evaluation of Angiogenesis and Pathological Classification of Extrahepatic Cholangiocarcinoma by Dynamic MR Imaging for E-Healthcare

Evaluation of Angiogenesis and Pathological Classification of Extrahepatic Cholangiocarcinoma by Dynamic MR Imaging for E-Healthcare

Digital Pulse Compression: Linear Frequency Modulation Approach

FHSA: fractional harmony search algorithm for polyphase code design in radar signal processing

Contact Info

Product

Resources

About